Fixing device and image forming apparatus

Abstract

A fixing device includes a belt-like member provided so as to circularly move, a forming member disposed so as to come into contact with an outer peripheral surface of the belt-like member and forms a pressing portion, where a recording material is pressed, between the belt-like member and the forming member, a contact member that comes into contact with the belt-like member, a heating member positioned on a side more distant from the belt-like member as compared to the contact member, and heats the contact member, a receiving member positioned on a side more distant from the belt-like member as compared to the heating member, and receives heat from the heating member, and a heat transfer portion provided so as to be connected to the receiving member and the contact member, and transfers heat to the contact member from the receiving member.

1 . A fixing device comprising:
 a belt-like member that is provided so as to circularly move;   a forming member that is disposed so as to come into contact with an outer peripheral surface of the belt-like member and forms a pressing portion, where a recording material is pressed, between the belt-like member and the forming member;   a contact member that comes into contact with the belt-like member;   a heating member that is positioned on a side more distant from the belt-like member as compared to the contact member, and heats the contact member;   a receiving member that is positioned on a side more distant from the belt-like member as compared to the heating member, and receives heat from the heating member; and   a heat transfer portion that is provided so as to be connected to the receiving member and the contact member, and transfers heat to the contact member from the receiving member.   
     
     
         2 . The fixing device according to  claim 1 ,
 wherein a plurality of the heat transfer portions are provided, and   heat is transferred to a plurality of portions, of which positions are different from each other, of the contact member.   
     
     
         3 . The fixing device according to  claim 1 ,
 wherein the heat transfer portion is formed integrally with the contact member or the receiving member.   
     
     
         4 . The fixing device according to  claim 1 ,
 wherein the receiving member is disposed along a width direction of the belt-like member.   
     
     
         5 . The fixing device according to  claim 1 ,
 wherein the heating member is provided so as to be movable relative to the contact member and the receiving member.   
     
     
         6 . The fixing device according to  claim 1 ,
 wherein the heat transfer portion is disposed with a gap between the heating member and the heat transfer portion.   
     
     
         7 . The fixing device according to  claim 1 ,
 wherein the receiving member is disposed so as to come into contact with a surface of the heating member that is positioned on a side of the heating member opposite to a surface of the heating member facing the contact member.   
     
     
         8 . The fixing device according to  claim 1 ,
 wherein the contact member is a temperature-sensitive magnetic member.   
     
     
         9 . The fixing device according to  claim 1 ,
 wherein the receiving member is a metal plate.   
     
     
         10 . An image forming apparatus comprising:
 an image forming section that forms images on a recording material;   a belt-like member that is provided so as to circularly move;   a forming member that is disposed so as to come into contact with an outer peripheral surface of the belt-like member, and forms a pressing portion, where a recording material on which images have been formed by the image forming section is pressed, between the belt-like member and the forming member;   a contact member that comes into contact with the belt-like member;   a heating member that is positioned on a side more distant from the belt-like member as compared to the contact member, and heats the contact member;   a receiving member that is positioned on a side more distant from the belt-like member as compared to the heating member, and receives heat from the heating member; and   a heat transfer portion that is provided so as to be connected to the receiving member and the contact member, and transfers heat to the contact member from the receiving member.